<template>
    <div>
          <!-- 面包屑导航 -->
       <el-breadcrumb separator-class="el-icon-arrow-right">
       <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
       <el-breadcrumb-item>商品管理</el-breadcrumb-item>
       <el-breadcrumb-item>商品列表</el-breadcrumb-item>
       </el-breadcrumb>

       <!-- 卡片视图 -->
        <el-card>
            <!-- 文字提示 -->
            <el-alert title="添加商品信息" type="info" center show-icon :closable='false'></el-alert >


            <!-- 步骤条区域 -->
            <el-steps :space="200" :active="activeIndex -0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
            </el-steps>
  

            <!-- 左边的标签页 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position='top'>
            <el-tabs  tabPosition="left" v-model="activeIndex" :before-leave='beforeTabLeave' @tab-click='tabClick'>
            <el-tab-pane label="基本信息" name="0">
                <el-form-item label="商品名称" prop='goods_name'>
                     <el-input v-model="addForm.goods_name"></el-input>
                </el-form-item>
                <el-form-item label="商品价格" prop='goods_price'>
                     <el-input v-model="addForm.goods_price" type="number"></el-input>
                </el-form-item>
                <el-form-item label="商品重量" prop='goods_weight'>
                     <el-input v-model="addForm.goods_weight" type="number"></el-input>
                </el-form-item>
                <el-form-item label="商品数量" prop='goods_number'>
                     <el-input v-model="addForm.goods_number" type="number"></el-input>
                </el-form-item>
                <el-form-item label="商品分类" prop='goods_cat'>
                    <!-- 级联选择器 -->
                     <el-cascader expandTrigger='hover' v-model="addForm.goods_cat" :options="addList" :props="cataProps"
                         @change="handleChange">
                     </el-cascader>  
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
                <!-- 渲染item项 -->
                <el-form-item  v-for="item in manyTableData " :key='item.attr_id' :label="item.attr_name">
                    <!-- 复选框 -->
                    <el-checkbox-group v-model="item.attr_vals" >
                    <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>   
                    </el-checkbox-group>
                </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
                <!-- 渲染静态属性 -->
                <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                    <el-input v-model="item.attr_vals"></el-input>
                </el-form-item>    
            </el-tab-pane>         
            <el-tab-pane label="商品图片" name="3">
                        <!-- acton: 表示图片要上传到的后台API地址 -->
                <el-upload  class="upload-demo"  :action='uplodURL' :on-preview="handlePreview"
                    :on-remove="handleRemove"  list-type="picture" :headers='headerObj' :on-success='handleSuccess'>
                     <el-button size="small" type="primary">点击上传</el-button>                   
                </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
                <quill-editor v-model="addForm.goods_introduce"></quill-editor>
                <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
            </el-tab-pane>
            </el-tabs>
            </el-form>


            <!-- 显示图片弹框 -->
            <el-dialog title="图片" :visible.sync="previweVisible" width="50%">
            <img :src="previweUrl" alt="" class="previewImg">
            </el-dialog>
    
  




        </el-card>
    </div>
</template>


<script>
//  深拷贝
import _ from 'lodash'

import { log } from 'util'
export default {
    data(){
        return{

            //  控制步骤条的步骤显示
            activeIndex:'0',

            //  验证左边的标签页区域 添加商品的表单数据对象
        addForm :{
            goods_name:'',
            goods_price:'',
            goods_weight:'',
            goods_number:'',
            goods_cat:[] ,
            pics:[],
            goods_introduce:'',
            attrs:[]
        },

            //   验证左边的标签页区域 验证规则
        addFormRules:{
            goods_name:[
                { required: true, message: '请输入活动名称', trigger: 'blur' },
                { min: 2, max: 8, message: '长度在 2 到 8 个字符', trigger: 'blur' }
            ],
            goods_price:[
                { required: true, message: '请输入活动名称', trigger: 'blur' },
                { min: 1, max: 10, message: '长度在 1 到 10 个字符', trigger: 'blur' }
            ],
            goods_weight:[
                { required: true, message: '请输入活动名称', trigger: 'blur' },
                { min: 1, max: 10, message: '长度在 1 到 10 个字符', trigger: 'blur' }
            ],
            goods_number:[
                { required: true, message: '请输入活动名称', trigger: 'blur' },
                { min: 1, max: 10, message: '长度在 1 到 10 个字符', trigger: 'blur' }
            ],
            goods_cat:[
                { required: true, message: '请选择商品分类', trigger: 'blur' }
            
            ]
        },

            //  获取商品参数列表
        addList:[],


            //  级联选择器绑定的数据
        cataProps:{
            label:'cat_name',
            value:'cat_id',
            children:'children'
        },


            //   动态参数列表数据
        manyTableData:[],

            //   静态参数列表数据
        onlyTableData:[],

            //  图片上传的地址
        uplodURL:'http://127.0.0.1:8888/api/private/v1/upload',

            //  图片上传组件的header请求头对象
        headerObj: {
            Authorization : window.sessionStorage.getItem('token')
        },

            // 弹框图片的显示与隐藏
        previweVisible:false,


        previweUrl:''




        }
    },


    // 生命周期
    created(){
        this.getAddlist()
    },

    // 方法
    methods:{

        // 获取商品参数列表
        async getAddlist(){
            const{data:res} = await this.$http.get('categories')        
            if(res.meta.status !==200){
                return this.$message.erroe('获取参数列表失败！')
            }
           this.addList = res.data
        },


        // 级联选择器change事件
        handleChange(){
           if(this.addForm.goods_cat.length !==3 ){
               this.addForm.goods_cat = []
           }   
        },


        // activeName : 即将进入
        // oldActiveName ：即将离开
        beforeTabLeave(activeName,oldActiveName){
            if(oldActiveName ==='0' && this.addForm.goods_cat.length !==3) {
                this.$message.error('请选择商品分类')
                return false
            }          
        },


        // 获取动态参数列表数据
        async tabClick(){
            if(this.activeIndex === '1') {
                const {data:res} = await this.$http.get(`categories/${this.cataId}/attributes`,{
                    params:{sel:'many'}              
                })
                if(res.meta.status !==200) {
                    return this.$message.error('获取分类参数列表失败！')
                }
                res.data.forEach(item => {
                    item.attr_vals = item.attr_vals.length === 0 ? '' :  item.attr_vals.split(' ')
                })
                this.manyTableData = res.data          

            }else{
                if(this.activeIndex === '2') {
                    const {data:res} = await this.$http.get(`categories/${this.cataId}/attributes`,{
                         params:{sel:'only'}
                    })
                if(res.meta.status !==200) {                   
                    return this.$message.error('获取分类参数列表失败！')
                }
                this.onlyTableData = res.data                
                }
            }
        },



        //  处理图片预览效果
        handlePreview(file){
            console.log(file);
            this.previweUrl = file.response.data.url
            this.previweVisible = true
        },



        //  处理移除图片的操作
        handleRemove(file){
            // 1.获取将要删除的图片的临时路径
            const fileInfo = file.response.data.tmp_path
            // 2.从pics数组中，找到这个图片对应的索引值
            const i = this.addForm.pics.findIndex(x => x.pic === fileInfo)
            // 3.调用数组的 splice方法 把图片信息 从pics数组中删除 
            this.addForm.pics.splice(i,1)

            
        },


        // 监听图片上传成功事件  
        handleSuccess(response){
            // 1.拼接得到一个图片信息对象
            const picInfo = {pic: response.data.tmp_path}
            // 2. 将图片信息对象，push到pics数组中
            this.addForm.pics.push(picInfo)
        },


        // 提价添加商品
         add(){
            this.$refs.addFormRef.validate( async valid =>{
                if(!valid) {
                   return this.$message.error('请输入表格必填选项!')
                }
                //  执行添加业务的逻辑
                // lodash cloneDeep()   深拷贝
                const form = _.cloneDeep(this.addForm)
                form.goods_cat = form.goods_cat.join(',')
               


                this.manyTableData.forEach(item => {
                    const newInfo = {
                        attr_id: item.attr_id,
                        attr_value:item.attr_vals.join(' ')
                    }
                    this.addForm.attrs.push(newInfo)
                })
                


                this.onlyTableData.forEach(item =>{                   
                   const newInfo = {
                         attr_id: item.attr_id,
                        attr_value:item.attr_vals
                    }
                     this.addForm.attrs.push(newInfo)
                })       
                form.attrs = this.addForm.attrs
                console.log(form)       



                const {data:res} = await this.$http.post('goods',form)
                if(res.meta.status !==201) {
                    return this.$message.error('添加商品失败！')
                }
                this.$message.success('添加商品成功！')
                this.$router.push('/goods')
            })
        }


        


    },

    // 计算属性
    computed:{
        cataId(){
            if(this.addForm.goods_cat.length ===3) {
                return this.addForm.goods_cat[2]
            }
        }


    }
}
</script>


<style lang="less" scoped>
.el-steps {
    margin: 15px 0 15px 0;
}
.el-checkbox{
    margin-right: 2px;
}
.previewImg{
    width: 100%;
}
.btnAdd {
    margin-top: 15px;
}
</style>